If I come from Luzern to visit House of Laderach at Bilten but my final destination is Zurich Flughafen, how to buy train ticket(s)? Shall I buy two separate tickets 1) one for Luzern -> Bilten, and 2) the other for Bilten to Zurich Flughafen, or just one ticket Luzern -> Zurich Flughafen?
For 2), can I stop at Zurich HB to do some sightseeing in the Old Town?